Emulsion base for skin care compositions
View Patent ↗The present invention is directed to an emulsion base for formulating cosmetic and dermatological compositions. The emulsion base has particular surfactant and/or emulsifier ratios such that a wide range of compositions with varying forms and additional components can be formulated without changing the ratio or amount of the primary and/or co-surfactant/emulsifier in the emulsion base or the amount of the emulsion base in the final composition. The emulsion base can be used in a system of formulating cosmetic and dermatological compositions.
1. A stable composition comprising an emulsion base, the emulsion base comprising:
one or more primary surfactants comprising the combination of sodium dicocoylethylenediamine polyethyleneglycol-15 sulfate and sodium lauroyl sulfate;
two co-surfactants, wherein said two co-surfactants are the combination of behenyl alcohol, glyceryl stearate, glyceryl stearate citrate, and sodium dicocoylethylenediamine PEG-15 sulfate, and the combination of glyceryl stearate, cetearyl alcohol, sodium lauroyl lactylate, and lecithin;
a diluent present in an amount of 39 wt. % to 87 wt. % of the total weight of the emulsion base;
an emollient present in an amount of 14 wt. % to 45 wt. % of the total weight of the emulsion base,
a humectant present in an amount of 3 wt. % to 11 wt. % of the total weight of the emulsion base; and
a thickener present in an amount from 0.05 wt. % to 3 wt. % of the total weight of the emulsion base,
wherein the one or more primary surfactants to the two co-surfactants are present in a ratio from 1:3.75 to 3.75:1,
wherein the emulsion base is 15 wt. % to 25 wt. % of the total weight of the composition.
2. The composition of claim 1 , wherein the ratio of the one or more primary surfactants to the two co-surfactants is 3:1.
3. The composition of claim 1 , wherein the ratio of the one or more primary surfactants to the two co-surfactants is 1:2.67.
4. The composition of claim 1 , wherein the emulsion base further comprises a preservative, wherein the preservative is present in an amount about 0.1 wt. % to about 2 wt. % of the total weight of the emulsion base.
5. The composition of claim 1 , wherein the emulsion base further comprises one or more ingredients selected from the group consisting of a sunscreen agent, a secondary surfactant, a secondary emollient, a skin-feel additive, a moisturizing agent, a film former/waterproofing agent, a bio-active ingredient, a pharmaceutical ingredient, a pH adjuster/chelating agent, a secondary preservative, an antimicrobial, a secondary humectant, a rheology modifying agent, a fragrance, a colorant; a plant extract, an absorbent, salicylic acid, alpha and beta hydroxy acid, a vitamin, and any combinations thereof.
6. The composition of claim 1 , wherein the ratio of the one or more primary surfactants to the two co-surfactants is 2.13:1.
7. The composition of claim 6 , wherein the ratio of the one or more primary surfactants to the two co-surfactants is from 1:2.67 to 3:1.
8. The composition of claim 6 , further comprising one or more film former/waterproofing agents.
9. The composition of claim 8 , wherein the one or more film former/waterproofing agents to the one or more primary surfactants and two co-surfactants are in the ratio of 0.1:7 to 7:0.1 in the composition.
10. The composition of claim 6 , further comprising one or more sunscreen agents.
11. The composition of claim 10 , wherein the one or more sunscreens are present at about 1 wt. % to about 40 wt. % of the total weight of the composition.
12. The composition of claim 6 , further comprising one or more secondary rheology modifying agents in an amount about 0.01 wt. % to about 10 wt. % of the total weight of the composition.
13. The composition of claim 6 , further comprising one or more secondary diluents in an amount about 40 wt. % to about 90 wt. % of the total weight of the composition.
14. The composition of claim 6 , further comprising one or more secondary emollients in an amount about 0.1 wt. % to about 30 wt. % of the total weight of the composition.
15. The composition of claim 6 , further comprising an effective amount of a pH adjuster to adjust the pH of the compositions to about 3 to about 9.
16. The composition of claim 6 , wherein said one or more primary surfactants further comprises sodium lauroyl sarcosinate.
17. The composition of claim 10 , further comprising a sunscreen booster.
18. The composition of claim 6 , wherein the diluent is water.
19. The composition of claim 6 , wherein the emollient is selected from the group consisting of C 12 -C 15 alkyl benzoate, PEG-7 methyl ether, and a combination thereof.
20. The composition of claim 6 , wherein the thickener is selected from the group consisting of acacia gum, xanthan gum, and a combination thereof.
21. The composition of claim 6 , wherein the humectant is glycerin.